Pressure drop in dual-cooled annular and cylindrical solid fuel assemblies for pressurized water reactor

Effects of rolling on resistance characteristics of single-phase flow in a 3 × 3 rod bundle

“…All the three models under predict the experimental data, which implies that the conventional correlations for circular channel using the concepts of mean velocity and hydraulic diameter as the characteristic length do not well describe the frictional coefficient for rod bundles. Lee et al (2012) reported that the McAdams and Blasius correlations showed good agreements with experimental frictional coefficient for a rod bundle (P/D ¼ 1.35) in the region of Re > 40,000, but the experimental data for low Reynolds number were not investigated. Therefore, the calculated method for frictional coefficient need to be further studied.…”

“…Rehme (1973aRehme ( , 1973b proposed the correlations for predicting frictional coefficient for rod bundles and the pressure drops for fuel element spacers. Lee et al (2012) conducted the experimental study on the frictional coefficients in the rod bundles and the local resistance coefficients at the spacer grids. Their results showed that the frictional coefficient in a rod bundle and the local resistance coefficient at the spacer grid in P/D ¼ 1.08 were smaller than those in P/ D ¼ 1.35.…”

Measurement and CFD calculation of spacer loss coefficient for a tight-lattice fuel bundle

“…Lee et al (2012) measured the friction factor using bare rod bundles for p/d = 1.08 and 1.35. They confirmed that the measured friction factor for the rod bundle with p/d = 1.35 agrees well with the McAdams correlation (Todreas and Kazimi, 1990).…”

On ballooning-free feature of a dual cooled fuel under LOCA

“…Other essential feasibility studies have been done Lee et al, 2012). In the safety analysis, it was found that the temperature of the pellet as well as the cladding tube would be much lower than that of the commercial cylindrical fuel (Chun et al, 2009).…”